Application of rubber dust in modified asphalts for SMA mixtures

L. Skotnicki
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引用次数: 0

Abstract

Abstract: The experimental investigation described in the paper refers to the properties of asphalts and asphalt mixtures with addition of rubber wastes. The influence of rubber additive, on rheological properties, viscosity, penetration, softening point of the asphalts were analyzed. An innovative technique based on the combined use of microscopic observations was developed. Tests results were compared to the conventional asphalts. Positive effects of modification were recorded. Two types of asphalt mixtures were prepared on the same mineral aggregate. For reference a Stone Matrix Asphalt (SMA) was used with polymer modified (PM) asphalt 45/80-55. Then the Stone Matrix Asphalt was prepared on the base of asphalt-rubber (45/80-55 AR). These materials were tested on rutting and water and frost resistant. The results indicated that the SMA mixtures prepared on the base of rubber modified asphalt exhibit greater resistance to permanent deformation, at elevated temperatures and greater water and frost resistance than the conventional SMA mixtures. Tests results were compared to technical requirements for SMA layers. It was found that this type of asphalt mixture can be successfully used in road surfaces, especially exposed to freezing. Keywords: Asphalt mixture; SMA mixture; rubber asphalt; Recycling; Dynamic viscosity.
橡胶粉尘在SMA混合料改性沥青中的应用
摘要:本文研究了橡胶废料对沥青和沥青混合料性能的影响。分析了橡胶添加剂对沥青流变性能、粘度、渗透、软化点的影响。一种基于显微观察结合使用的创新技术被开发出来。试验结果与常规沥青进行了比较。记录了改良的积极效果。在同一矿物骨料上制备了两种沥青混合料。作为参考,石基沥青(SMA)与聚合物改性(PM)沥青45/80-55混合使用。然后在沥青-橡胶(45/80-55 AR)的基础上制备石基沥青。对这些材料进行了车辙试验和耐水、耐霜试验。结果表明,在橡胶改性沥青基础上制备的SMA混合料比常规SMA混合料具有更强的耐高温、耐永久变形、耐水和抗冻性能。将测试结果与SMA层的技术要求进行了比较。研究发现,这种类型的沥青混合料可以成功地用于路面,特别是暴露于冰冻的路面。关键词:沥青混合料;SMA混合料;橡胶沥青;回收;动态粘度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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